TOG measures how warm a fabric keeps your baby — the higher the TOG, the warmer the sleepwear. Below we cover what TOG means, how to read a TOG chart, and how to dress your baby for the room temperature.
0.2 TOG
>75°F
Short-sleeve pajamas
What is a TOG rating?
Back to Baby Sleep
Whether you're expecting, deep in the newborn trenches or in the toddler vortex, you've probably come across the term TOG and thought…sorry...what? Do I need a degree in sleepwear? What is happening. We hear you, you've come to the right place - welcome to our TOG talk.
What does TOG mean?
TOG stands for Thermal Overall Grade. It's a unit of measurement that tells you how warm a fabric will keep your baby. This makes dressing your baby simpler and safer as both overheating and loose layers like blankets, can pose a risk to infant sleep.
You'll see TOG ratings on quality and tested sleep bags, swaddles, and sleep suits. Underneath those, you dress your baby in breathable layers, as recommended on a dressing guide.
Put simply:
The lower the TOG rating, the lighter and less insulating the fabric.
The higher the TOG rating, the warmer and more insulating the fabric.
What TOG Do I Need?
Great question, we'd love to tell you! The good news is you don't need a TOG for every single temperature notch on the thermometer, as each TOG covers a range of degrees. This means there is some flexibility in how you use your breathable layers underneath to achieve the optimum comfort for your baby.
To start:
- Check the temperature in your baby's room, or yours if they are a newborn sharing your room.
- Follow a temperature chart by selecting your room temperature on the top first, then move down the guide to see what TOG and layering options you have.
- This is where you will see how you can layer up or down under a TOG rated swaddle, to get more wear across the temperature range.
TOG Clothing Guide
Select a TOG rating to see what your baby should wear at each room temperature.
1.0 TOG
68°F
72°F
75°F
Romper and short-sleeve bodysuit
Romper
Short-sleeve pajamas
1.5 TOG
64°F
68°F
72°F
Romper and short-sleeve bodysuit
Romper and sleeveless bodysuit
Short-sleeve, long-leg pajamas
2.5 TOG
61°F
64°F
68°F
Romper and long-sleeve bodysuit
Romper and sleeveless bodysuit
Short-sleeve, long-leg pajamas
3.5 TOG
57°F
61°F
Romper and sleeveless bodysuit
Romper
Important: Every child feels temperature differently, and room temperature, health and clothing layers all play a part. Use this as a general guide only — as a parent or caregiver, you're best placed to judge what's right for your child.
Shop By TOG
TOG Ratings by Season
Climate varies a lot depending on where you live in the US, but here's a general guide to help you plan ahead.
Summer
June – August
US summers vary a lot depending on where you live and whether you use air conditioning. On warmer nights when your nursery climbs above 75°F, a 0.2 TOG is the safest bet. On especially hot nights, baby might just need a short-sleeve onesie or even just a diaper underneath. For most typical summer evenings where an air-conditioned room sits around 68–75°F, a 1.0 TOG with a short-sleeve bodysuit works well.
Fall & Spring
Sep – Nov / Mar – May
The shoulder seasons are the trickiest because temperatures can swing from warm days to cool nights (and then back again). Having both a 1.0 TOG and a 1.5 TOG on hand means you can switch depending on the evening. Check your nursery temperature at bedtime rather than going off the weather forecast. Already have a 2.5 TOG? It can be worn up to approximately 68°F, but layer accordingly and check for signs of being too hot.
Winter
December – February
For most winter nights, a 2.5 TOG will do the job. If your home gets really cold overnight (below 61°F), step up to a 3.5 TOG. Layer a long-sleeve bodysuit underneath and you're all set.
TOG temperature chart
Follow our helpful clothing and dressing guide by TOG and temperature to dress your baby comfortably for sleep. Save for later for easy reference during your nap and nighttime routines.
What to Dress Baby in Under Each TOG
The TOG rating covers the sleep bag or swaddle itself, but what baby wears underneath matters too. There is some flexibility to layer up and down within the temperature range, to get the most value from your TOG-rated sleepwear.
Choosing a lightweight, breathable layer that is soft and has slight stretch will allow for comfort, movement and sit flat against the skin under their TOG rated sleepwear.
These are general guidelines. Every baby is different so always check if they are too hot or cold and adjust a layer accordingly.
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Safety tip
When in doubt, go with the lower TOG. It's always safer for baby to be slightly cool than too warm.
TOG for Newborns vs Babies vs Toddlers
The TOG rating itself doesn't change based on your baby's age. Correct TOG testing will ensure the TOG is relevant to the garment, and not the baby's age or sleep development stage. Here are a few tips when dressing your baby with a TOG rated swaddle or sleep bag:
Newborns (0 to 3 months)
- Newborns are still learning to regulate their temperature, so they're more sensitive to being too hot or too cold. Generally, the mid TOG ratings (1.0 or 1.5) are a great start unless your home is very cold. Our 1.5 TOG swaddle is a popular choice for newborns as it provides a little more warmth which can be preferable for a hospital environment as well.
- Shop TOG rated swaddles for newborns
Babies (3 to 6 months)
- This is when most babies transition from a swaddle to an arms-free sleep bag. The Love to Dream™ Transition Bag makes this easy with zip-off wings, whilst still offering the snug security of the swaddle they love but soon, they will be arms free! They are TOG rated so the same logic applies but you may want to pick up a long-sleeve bodysuit to keep their arms covered and comfortable.
- Shop TOG rated Transition sleeping bags for babies
Read more: When to stop swaddling your baby
Babies + Toddlers (6, 12 months+)
- Babies that are on the move and toddlers tend to move around a lot in their sleep (and are notorious blanket-kickers). A sleep bag or sleep suit that stays in place, keeps them covered all night without the worry of blankets coming loose or tangled. Hello peace of mind! Our On The Move range comes in the same TOG ratings, just in bigger sizes.
- Shop TOG rated sleeping bags and sleep suits
Why TOG Ratings Matter for Safer Sleep
Getting the right TOG isn't just about comfort. It plays a part in safer sleep:
- Babies can't regulate their own body temperature the way adults can, especially in the first 12 months.
- If they're dressed too warmly, they're at higher risk of overheating, which is a known risk factor for SIDS (Sudden Infant Death Syndrome).
- Similarly, if they're too cold, they might wake frequently and struggle to settle.
Following a dressing guide and using the right TOG for your baby's room temperature helps reduce the risk of overheating.
A TOG-rated sleep bag or swaddle also stays in place and gives you more predictable, even warmth distribution. A comfortable, fitted swaddle or sleep sack can also remove the risk of covers being kicked off or loose layers pulled over baby's face.
Learn more: Safer Sleep Guidelines for babies
How to Tell if Your Baby is Too Hot or Too Cold
Even with the right TOG, it's good to know the signs that your baby might need an adjustment.
The neck/chest check
Slide your hand down the back of baby's neck or onto their chest. It should feel comfortably warm, not hot or clammy, and not cold. This tells you more than checking their hands or feet, which tend to run cooler naturally.
Read more: Signs your baby is too hot or too cold while sleeping
Remember: You know your baby best. These are guidelines to help but trust your instincts. If something doesn't feel right, check and adjust.
How We Test Our TOG Ratings
Published TOG ratings should be considered in conjunction with our specific clothing guides (found online and on pack) and are from test results that we believe reflect the appropriate TOG when used in conjunction with our clothing guides.
- Test methods are EN ISO 11092, ASTM 1291 (modified to the same parameters as EN ISO 11092) and ISO 5085-1.
We believe that our TOG ratings, together with our clothing guides, help parents and caregivers make the best decision on how to dress their child at different room temperatures.
We also provide guidance on how the parent or caregiver can check if the child is too hot or too cold. This is important in empowering the parent or caregiver to decide what is best for their child. All children are different.
The number of clothing layers required may vary according to a child's health, their physiology, the room temperature, the outside temperature and other factors. The caregiver must determine what is suitable. We do not provide medical advice.
Frequently Asked Questions
Sleep Bag vs Swaddle: Do TOG Ratings Change?
Nope! A 1.0 TOG swaddle provides the same warmth as a 1.0 TOG sleep bag. The TOG measurement is based on the fabric's insulation, and each product is tested in its specific style, shape and size. So when you're transitioning from swaddle to transition bag to sleep bag, you don't need to change your TOG unless your room temperature has changed. Just match it to the room as usual and follow your dressing guide for layering.
Can I layer bags to increase the warmth?
No. Layering one sleep bag over another is not recommended. The TOG ratings are designed to provide the right level of warmth on their own. Doubling up can lead to overheating, which is a safety risk. Instead, choose the correct single TOG for your room temperature and adjust what baby wears underneath.
What do babies wear underneath a sleep bag or swaddle?
It depends on the TOG rating and your room temperature. As a general guide, a bodysuit, romper, onesie or pajamas are worn under a sleep bag or swaddle. Always check the clothing guide on your product's packaging for specific recommendations.
Do I still need to swaddle on top or underneath a TOG rated swaddle?
Nope! Our TOG rated swaddles replace the need for extra blankets or wrapping. It's a one and done sort of situation. Less layers, less stress!
Do I still need to use a blanket?
No. For babies under 12 months, loose blankets are not recommended as part of safer sleep guidelines and for older babies, blankets often come with a range of challenges. They can be kicked off and the development might not be there yet to be able to put it back on easily. Cue many night disturbances. A TOG-rated sleep bag or swaddle is like a wearable blanket and replaces the need for blankets entirely. They provide more consistent, predictable warmth and stay put so no middle-of-the-night tuck-ins needed.
Do I have to use a TOG-rated swaddle or sleep bag?
You don't have to, but it makes life a lot easier. A TOG-rated product takes the guesswork out of dressing your baby for sleep. Without one, it can be tricky to know whether your baby is warm enough (or too warm). Plus, sleep bags and swaddles are often recommended over loose blankets as part of safer sleep guidelines as they reduce the need for loose layers in the sleep space.
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